Originally Posted by tidal
I am having the same problem except MCE and HDTV Wonder were working flawlessly before I reloaded MCE.
I reloaded MCE 2005 with kram drivers from here: http://www.hdtvtunerinfo.com/krammcehdtv1.html
That page says its not the full version of kram so I'm wondering if thats the problem.
I get jerky video on the digital channels, whats funny is I can watch hdtv on my 360 through this machine without any jerky video.
I've had a couple related issues, one of which I could solve and one I couldn't. From your description, I'm not sure these are related, but the experiment is easy. I found that 1080i deinterlacing was too CPU intensive for my system, but 720p was no problem. I believe my issue is a non-HD capable graphics card, which I've avoided upgrading due to heat/power issues. It causes semi-lockups (could be called jerky performance, as it eventually moves forward) in normal mode, and after I "fixed" it, slightly jerky (not entirely smooth) video in some particularly complex 1080i broadcast scenes, but smooth most of the time. Anyway, the partial fix is to change the Priority of the MCE process to "Normal" instead of "AboveNormal." I haven't found a permanent way to do it, so I have to do this every time I play back 1080i content (a bit of a pain). If anyone knows of a permanent way to change a the MCE shell's priority, please let me know.
To make the change (temporarily) for your experiment, bring up the Windows task manager after getting ready to play some normally jerky video. In the applications tab, select the MCE application, right click and go to process. That's the process you need to modify. You can change it now by right clicking and selecting Set Priority->Normal. However, it will change back once it starts playing. At this point, start the program playing, but immediately pause the program and bring up the Windows Task Manager again Ctrl-Alt-Delete (which should bring you back to the same process). Repeat the right click Set Priority->Normal, making sure the dialog box you have to accept is over MCE and not the task manager. After that, you can mouse click play and it should stay in Normal priority, which at least on my system makes for much smoother playback without lockups.
I believe the reason this helps is that by lowering the priority of the MCE shell, it allows the deinterlacing to get more resources (not sure if it's more CPU or more I/O it actually needed), where's it's most needed.